Water and steam meter



(No Model.) 2 Sheets-Sheet 1.

A. C. CHRISTENSEN.

.WATER AND STEAM METER.

10.269,260. Patented 1360.19, 1882.

(No Model.) 2VSheets--Sheet 2. A. C. GHRISTENSEN.

WATER AND STEAM METER.

110.269.260. Patented Deo..19, 1882.

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/fb ATTORNEY UNITED STATES yPATENT OFFICE.

AUGUST C. OHRISTENSEN, OF BROOKLYN, NEW YORK.

WATER AND STEAM METER.

SPECIFICATION forming part of Letters Patent N o. 269,260,-dated December 19, 188.2.

Application filed July 20. 1882. (No model.)

To all whom it may concern 'Be it known that I, AUGUs'r C. CHRisTEN- SEN, of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Water and Steam 1lllfleters, ot' which the following is a specifica- Ion.

This invention relates to that class of meters known as piston7 meters, and may be used for measuring water and steam.

"The invention consists of a meter the reciprocating plun gers or pistons of which are each made in the form of slide-valves, which work in connection with inlet and outlet ports and diagonal passages arranged in the lower part of the casing of the meter, the inlet of the water being regulated by gridiron-valves sliding on the top part of each plunger, the whole being so arranged as to enable each plunger or piston to entirely finish its stroke, whereby the absolutely correct measurement ofthe fluid or steam is obtained.

In the accompanying drawings, Figure 1 represents a plan view of my improved water and steam meter, in which the top plate and counter are removed, so as to show the admission-valves. Figs. 2 and 3 are respectively a vertical longitudinal section on line x x, Fig. 1, and a vertical transverse section on line y y, Fig. l; and Figs.4 and 5 are respectively a vertical longitudinal section on line e z, Fig. 1, and a vertical transverse section on lineK K Fig. 4.

Similar letters ot reference indicate corresponding parts.

The body or casing of this improved water and steam meter is preferably cast in one piece, and consists of two parallel hollow cylinders, A A', closed by heads A2, secured thereto, an upper chamber or valve-chest, A3, extending from the top side ot' one cylinder to the top side of the other cylinder, and provided with an inlet-port, a, and a lower oblong chamber, A4, extending from the bottom side of one cylinder to thebottom side of the adjacent cylinder, and provided with an outletport, b.

TheplungersBB, which partake of the character of slide-valves, are cylindrical in shape, and t closely the interior of the respective cylinders. The plunger B is provided in its are coiicaved on their under sides to fit thc` rounded surfaces ot' the plungers. The valve C is provided with openimtgsf,` which register with the openings c, and with openings j", which register with the openings c', the two sets of openings being so arranged that when those of one side are open those of the other side are closed. The valve C is provided with similar openings. f2j`3, which register with the openings c2 c3. Each of these gridiron-valves is also provided with studs g g at either end,

which come in contact with the ends of the valve-chest as the plunger nears the end of its stroke and cause the valve to shift, so as to close one set ot'l openings and open the other Set.

The channels d dof the plunger B'communicate respectively with the channels It h of the cylinder A as said plunger moves alternately from one end ot' said cylinder to the other, while the channels cl2 d3 of the cylinder B communicate respectively with the channels h2 h" of the cylinder A. A diagonal channel, fi, connects the channel It of the cylinder A with the left-hand end of cylinder B hy means ot' the vertical channels k and l and the curved channel m of the plunger B. The diagonalchannel i', parallel with channel t', connects the channel h3 of cylinder A with the righthand end ofcylinder A. Gorrespond'ingly the diagonal channel t2 connects the channel h2 ot' cylinder A with thelet't-hand end of cylinder A, While the parallel diagonal channel i3 connects the channel h of cylinder A with the right-hand end of cylinder A by means of the vertical channels k Z and the curved channel m of plunger B. y

The operation of my improved water-meter is as follows: The water enters through the in- IOO let-port a into the valve-chest A3, and passes then through the opening f3 of the gridiron slide-valve C and the ports c3, channels and h3, and the diagonal channel vl to the rightlland end of cylinder A, exerting thereby a pressure at the right-hand end of piston B and forcing the same toward the left into the position shown in the drawings. The plnngerB carries along its gridiron slide-valve C, the stud g of which strikes against the side wall of the chest A3, so as to open the portf and admit a current of water to pass through the openings fc and the channels d h m 7c and the diagonal channel i to the channel l to the left-hand end of the cylinder A. At this point both pistons are at one and the same. end of the cylinders A A'. Owing to the pressure ofthe water on the left-hand end ot' the piston B, itis forced toward the right until the stud of its slide-valve C strikes the opposite side ot' the chest A3, whereby the gridiron slide-valve C is shifted and acurrentof water allowed to pass through the ports f2 (fL and the channels d2 h2 and the diagonal channel i2 to the left-hand end ofthe cylinder A, so as to compel the piston B to quickly follow thepiston B and to move it'over to the right-hand end of the cylinder A. The stud g of the slide-valve C thereby strikes against the right-hand side wall of the chest A3, causes the slide-valve C to be shifted and a current of water to pass through the port'sf c and the channels d' h m 7c and the diagonal channel i3 to the right-hand end of cylinder A', so as to throw thereby the piston B toward the left. Corresponding to the movements of the pistons described, the spaces lilled with water between the ends of the pistons and the cylinder-heads are successively exhausted, the righthand end ofthe cylinder Aexh a listingth rough the diagonal channel i3, channel K', m', and f4 to theeXhaust-port. The right-hand end ot' the cylinder A exhausts next through the diagonal channel i', h3, m2, and j' tothe exhaust-port. The left-hand end of the cylinder A exhausts next through the channel l, diagonal channel i, channels k, m, andy"4 to the exhaust-port b. Finally the waterin the space at thcleft-hand end of the cylinder A is exhausted through channel l2, diagonal channel i2, channel h2, fm2, andfto the exhaust-port b. y 1n the operations described two sets of channels serve to conduct the water to the same ends ofthe respective cylinders, while the other two sets serve to exhaust it from the opposite ends ofthe respective cylinders.

The plunger-valve of cylinder A is preferably a B-valve, while the plunger-valve of cylinder A is preferably a D-valve.

The cover A5 of the box A3 is provided with inwardly-proiecting studs s s, (shown in dotted lines in Fig. 3,) the lower ends of which project into longitudinal grooves in the plungers and serve to prevent rotation of the latter. The gridiron-valves are kept in position by the side Walls of the box and by the studs. The studs may serve simply for preventing lateral movement ofthe gridiron-valves, and any other suitable means adopted for preventing rotation of the plungers.

The motion of the plungers is registered, in the manner well known in water-meters, by a suitable connecting mechanism on a counter, D, placed on the top plate of the chest b, said registering mechanism being not shown in the drawings, as the same is a well-known feature of all water-meters with reciprocating plun gers.

rlhe advantages of arranging the plungers with slide-valves in the body thereof is that the expense forseparate valves and valve-seats in the lower part is dispensed with, and that the whole body can be cast in one piece, instead of thelower,A4, being screwed to thebottom of the cylindrical casing, as has been the case heretofore in Water-meters with reciproeating plnngers. Another advantage is that by the actions of the plungers the admission and exhaust are directly regulated, instead of one plunger working Ythe valve of the other plunger, as heretofore. Owing to the fact that each plunger is enabled to entirely finish its stroke before the other begins its motion, the meter will register water or steam at any speed with absolute safety, and'form thereby a reliable, durable, and comparativelyinexpensive measuring device thatis adapted for waterorsteam, as the case may bc:

Having thus described my invention,Iclaim as new and desire to secure by Letters Patentl. rlhe combination of an inclosing-casing having a chest at the upper part and diagonal channels at t-he lower part, reciprocatory plungers or pistons having channels forming slidevalves. and valves resting loosely on said plungers and operated by contact with the casing, substantially as described.

2. 1n a water and steam meter, the combination ot' an inclosing-casing having a chest at the ripper part and two sets of diagonal channels crossing each other at the lower part, two reciprocatory plungers or pistons having channels which form slide-valves, two double gridiron slide-valves having curved under faces resting on said plungers and communicating with openings therein, one halt' the openings to each gridiron-valve being closed while the other half is open, substantially as described.

In testimony that I claim the foregoingas my invention l have signed my name in presence of two subscribing witnesses.

AUGUST C. CHRISTENSEN.

Yitnesses PAUL GOEPEL, SIDNEY MANN.

IOO

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